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Vol. 50 No. 5, 2011
The similis-Subgroup within Triconia (Copepoda: Cyclopoida: Oncaeidae) from Korean Waters (East China Sea), Including a New Species
Jin-Hee Wi1 , Kyoung-Soon Shin2 , and Ho-Young Soh1,*
1Division of Marine Technology, Chonnam National Univ., Yeosu 550-749, Korea
2South Sea Research Institute, KORDI, Geoje 656-830, Korea
Jin-Hee Wi, Kyoung-Soon Shin, and Ho-Young Soh (2011) Two
small oncaeid copepods were collected in June 2009 using a conical net
of a fine mesh size (100 µm) from off the southern coast of Cheju I.,
Korea (Northwest Pacific) which is affected by the Tsushima Warm
Current. One species is newly recorded from Korean waters, and the
other is new to science. The new species, Triconia denticula
sp. nov., differs from already described similis-subgroup species by a
“bulging” lateral margin at the midlevel of the female genital
double-somite covered by minute scales on the middorsal and lateral
surfaces; the anal somite of the species is ornamented with small
scales on the dorsal and ventral surfaces; and the exopodal outer seta
of P5 is very long and plumose, which is longer than those of other
species of the similis-subgroup. Males of this species were not found so far. Triconia umerus
(Böttger-Schnack and Boxshall) which is newly recorded from Korean
waters is redescribed with a comparison of its morphological details
and differences from published studies. In addition, the zoogeography
of the similis-subgroup described from the Northwest Pacific is summarized.
Key words: Taxonomy, Oncaeid copepods, Triconia, Tsushima Warm Current, Zoogeography.
*Correspondence: Tel: 82-61-6593191. Fax: 82-61-6593199. E-mail:hysoh@chonnam.ac.kr
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